rissman



Dec. 30, 1924. 1,520,722

P. RISS MA N FASTENER MAKING AND DRIVING TOOL Filed Jan. 16, 1922 5 Sheets-Sheet 1 i i Iii/W15 lb INVENTOR,

. 3 E212 ,Plfsamun 7 3 9 f 'M M 1 0 ATTORNEY.

Dec. 1924- I 1,520,722

P. RISSMAN FASTENER MAKING AND DRIVING TOOL Filed Jan. 16, 1922 5 Sheets-Sheet 2 IIYVENTOR. Pau Z Pzasvzan BYW A TTORNE Y.

P. RISSMAN FASTENER MAKING AND DRIVING TOOL Filed Jan. 16, 1922 5 Sheets-Sheet s :70 INVENTOR.

uZ RIsxsman ATTORNEY.

P. RISSMAN I FASTENER MAKING AND DRIVING TOOL Filed Jan. 16, 1922 s Sheets-Sheet 4 7 .15 /INVENTOR. Paw? Ezlsqman.

Dec, 30, l 924.

P. RISSMAN FASTENER MAKING AND DRIVING TOOL Filed Jan. 16, 1922 5 Sheets-=Sheet 5 Jmxvroze pzissman.

PRAANNNAANAK on /IIKIIIIIIII II Patented Dec. 30, 1924.

UNITED STATES PAUL RISSMilxN. F 111153131? FASTENER MAKING AND DRIVING 2001;.

Application filed January 1e.

To all iii/1.0m it s imy concern Be it known that 1, PAUL Rrssnan, a citizen of the United States, and residing at Detroit, in the county of lVaync and State of Michigai'i, have invented a new and l n'iproved Fastener hlaking and Driv ing Tool, of which the following is a speci lication.

This invention relates to portable tools for forming fastening devices, such as staples. from wire, and for driving the fasteners as they are produced, and its object is to provide a tool of this character which may be operated by compressed air or other fluid, which shall be of such small size that it can be readily handled, and which will produce and deliver only one fastener at each actuation of the control mechanism.

This invention consists in a supporting handle, an air cylinder carried thereby and a piston in the cylinder, a shaft rotated by the piston, a fastener forming device actuated by the shaft and a fastener driving de vice actuated by the piston.

It further consists in a manually actuated valve for controlling the flow of air to said cylinder and automatic means for causing the valve to close after each rotation of said shaft.

It also consists in the novel details of construction illustrated in the accompanying drawings and particularly pointed out in the claims.

In. the accompanying drawings, Fig. 1 is plan of this fastener .forn'iing and driving tool. Fig. 2 is a side elevation thereof. F 3 is a central section parallel to the view in Fig. 2. Figs. and are sections on the lines 44 and 5-5 of Fig. 3. Fig. 6 is a perspective of the forming anvil. Fig. 6 is an end View of the same. Fig. 7 is a front and S is a rear elevation of this tool. Figs. 9 to 14L inclusive are sections on the lines 9-9 to l l 'l l inclusive respectively of Fig. 3. Fig. is a perspective of the driving ram. 16 is a perspective of a staple former. Fig. 17 is a perspective of a guide therefor. Fig. 18 is a view of a staple. Figs. 19 to 26 inclusive are diagrams illustrating the positions of the fastener forming and driving devices. Fig. 27 is a plan and Fig. 28 is an elevation of the mutilated gear which.

fieriai No. 529.730.

drives the feeding device for the wire from which the fasteners are formed.

Similar reference characters refer to like parts throughout the several views.

The type of fastener which is formed by the particular tool shown in the drawings is a staple A illustrated in Fig. 18 and con sists of a central bar 1 and two legs 2. The tool embodies a case consisting generally of a handle 33" which may be provided with ribs at to assist the operator in holding the tool, and in a head 5 5 on which is mounted a reel for the supply of wire from which the fasteners are formed. The handle and head together consists of two parts 3-5 and 85 held together by the screws 6. i

In the lower part of the handle (Fig. and integral with the part 3 of the case is a valve chamber 7 into which connects the nipple 8 adapted to receive the coupling 9 of the air-hose 10. A washer 12 may be mounted in the valve chamber and constitutes a seat for the valve 13 which is normally held on its seat by a spring 14. The stem 15 is reduced intermediate its ends to permit air to flow to the conduit 16 (Fig. 12) which connects to this valve chamber and to the air cylinder.

The head portion 5 of the case includes a cylinder 17 in which a piston 18 is slidable and a rod 19 is connected to the piston. The cylinder head 20 has a small passage 21 which connects one end of the valve chamber 22 to the passage 23 leading to the interior of the tool. The opposite or inner end of the valve chamber opens directly into the interior of the tool. in this valve chamber 22 is a valve 24 having a reduced intermediate portion 25 and which opens and closes the ports 26 and 2'? connecting to the cylinder. Adjacent the valve chamber 22 and connecting to the intermediate part thereof by means of a passage 28 is a small and short chamber 29 (Fig. 10) into which connects the conduit 16 as indicated in dotted lines in Fig. 8. At each depression of the valve 13, therefore. compressed air is admitted to the valve chamber. This cylinder and the parts connected thereto is therefore a pneumatic motor.

A bracket 31 projects inwardly from the side 3 and constitutes a; bearing for the main shaft 32, which makes one rotation for each fastener. a nut 33 holding the shaft in position. On this shaft are secured a crank disk 3-1 which is actuated by the piston rod 19., an eccentric which actuates the staple {caning rain, an eccentric 36 which actuates the valve 2%, and a mutilated 'ear which actuates th feeding mechanism for the wire. A connecting rod 38 extends from the eccentric 36 to the valve being connected thereto by a pin -When the valve is at the left or inner end or its stroke. air passes from the conduit 16 and chamber 29 into the valve chamber 22 between the enl rged ends of the valve 25 and throuo'h th nort 2" into the cvlinder o l n 17. while air from the opposite end or outer end of the valve chainber through the passage 21 into the passage and into the interior of the hanr lc. dllien the valve is the other end of the valve chamber, air from the inner end or the cylinder passes through the port 26 directly into the handle, while air from the chamber 29 passes through the port 27 into the outer end oi the cylinder. Each enlarged end of the valve uncovers the adjacent port at each end of its stroke.

Attached to the top of the part s ol' the case is a stamping corr'sting ot a base and a rim 4-0 which has a slot 11 througlhich the st..ple wire 1-. may run. A huh 3 a tached to the base 39 constitutes th hearing for a sleeve l-lo spool vhich has L c two sides and 4-6. crinn and spring ingers 48 havino; nibs 4:9 adapted to engage i the moove 50 in the llll] 43 to retain the ol in position. The spool runs freely on th hub.

F rmed on the outside of the part i he case s elono ated boss 52. shown vfiiou in Fin". 2 and in section in Fig.

i this bo s is a longhoarino' short hear-inn; sleeve which carrv a h ving a grooved -teed roller at .r at the o her provided h to mesh with inuti- The number of to ar is sufiicient to tee nlc.

.cn the boss is a ch s a bearing sleeve shorter boss 7 .1 tor the shat-t s s aft is a n'rooved roller 61 re th wire 42 aa' inst the roller 7*. on e .:2 i attached to the plate 121 which is sec ed in position bv the screws Thi case norniallv encloses the feed In rder to stop these rollers so "he m t lated gear 37 will alwavs propv ne h w th the gear 57 on the shaft the oller 56 provided with two notches dircctlv opposite each other into which the end of the spring engages whenever th roller has made afhalt rotation.

in this guide and the corner 73 formed thereon acts as a shear member to cut the wire $2. The incline of this cutting edge serves to point the ends of the legs 2 of the taple, a. shown in Fig. 18. The torining has a pair of cani lugs 4 to lift the orniing anvil out of the path of the driving rain and a cylindrical boss i5 on its lower t each rotation. of the shaft ding rain makes one complete forward and back stroke.

The staple is formed on the forming anvil 9 which has two ears 1''? which extend suttiientlv to rest on the ribs '70 of the guide and has a central boss 78 which is adaptextend down between the ribs 79 on the forming rain. lVhcn the formingrain t its inner position. the rollers 56 and i a proper length of wire across the ace between the ribs 70. Thereupon the rain moves forward and first are the wire. then moves the severed cc A up to the boss 78 on the forming n bonds the ends of this piece A. ie sides of this boss to produce a and finall lifts the boss 78 above (DC) JD stable e inclined lugs or canis 7 1. The anvil is no]. ally held down by the spring 120 carried ev a cap 121.

Slidable between the ribs 79 is the driving rain 81. shown in Fig. .5, which. has a c v lindrical boss 82 adapted to extend in a hole in one end of the piston rod 19. Mountcd in the piston rod just back of the boss is a pin 83 wh ch receives one end o1 the connecting rod Set which is also mounted on a crank pin 85 on the dis;

Attention is now directed to Figs. 19 to inclrsivc. The piston rod is cinitted and the connecting rod 8% is shown parts are shown at the normal stationar nositions in 19.. which shows the eccentric 1 7 has a lead of about ten degrees over the cranl: pin 8:. ii lier. air as admitted to the inner end of the cvlinder, the shaft 32 is in the direction of the arrows in 's. 21 and At the positions shown in 20. the wire 42 is ted inward, this becoinpleted at Fig". 21. Vfhen the parts as shown in 23 and 23, the wire ecu severed and carried "forward until is pressed against the boss 7 8 of the forming anvil. About forty degrees of rotation of the shaft completes the forming of the staple and twenty five degrees more causes the cam lugs 74 to lift the boss 78 on the anvil 69 out of the path of the staple and of the driving rain 81. This driving ram engages the staple about fifty-five degrees before the outer end of its stroke, shown in Fig. and during these fiftyfive degrees the staple is pushed out of the guide on the forming ram for the driving ram. The driving and forming rains then return to the initial positions shown in Fig. 19.

Attention is called to Fig. 4, which shows the driving ram, the piston rod and piston in the most withdrawn posi tions and the eccentric 35, connecting rod '76 and forming ram only about ten degrees advanced from such position. The crank disk has two inclined cam faces 84 and 85, a notch 86 spaced from the notch by a circular portion 87, and a substantially spiral portion 88 between the circular portion 89 and the cam 85. A. pin 90 carried by the part supports an arm 92 which carries a roller 93 pressed against the crank by the spring 94;.

When the parts are as shown in Fig. 4, the crank 34 is on center, the pin 85 being in the line of movement of the pin 83. Any pressure on the piston 18 would be ineffectual to turn the shaft 32. But the pressure of the roller 93 on the inclined surface 85 will turn the crank off the center so that air admitted between the head and the piston may turn the shaft. In a similar manner, the roller 93 and inclined face 84 serve to prevent the crank from stopping on the other center.

Just before the notch 86 reaches the roller 93, the air entering at the valve 13 is cut off, as will be explained, so that the pneumatic motor has not sufficient force to force the roller 93 out of this notch after it has dropped into the notch, so that the parts stop in about the position shown in Fig. 19.

Referring now to Figs. 3, 11 and 27, a pin 9-5 is mounted in the part 3 and serves as a pivot for the trigger 96 and the plate 97. The trigger has a fingenpiece 98 extending outside the case and a spring 99 to hold the upper end of the trigger outward. On a small arm 100 of the trigger and on the pin 102 carried thereby is a lever 103 whose lower arm has a pin 104: at its end adapted to project into the slot 105 in the plate 97, and a shoulder 106 adapted to contact with the top of this plate 97 toward the pivot 95 from this slot. The upper end of the upper arm of the lever is adapted to be engaged by a cam plate 107 carried by apin 108 mounted in a hole 109 in the mutilated gear 37.

i A spring 110 connects an arm 111 on the lever 103 to the plate 97 and an adjustable screw 112 mounted in a lug 113 on the part 3 limits the upward movement of the plate 97. i-Vhen the trigger is pressed in, the lever 103 presses down the plate 9? and the valve 15, admitting air to the conduit 16 and to the valve chamber .22, causing the motor to actuate the shaft 392. The trigger is held in to hold down the valve. But when the shaft 32 has made one rotation, the cam plate 10? strikes the upper end of the lever 103, pressing it outward and moving inward the lower end thereof, causing the shoulder 106 to move in from over the pivot wall of the slot 105 in the plate 97 to permit the spring 1.10 to lift this plate. The spring 14: now closes the valve 13 and the motor stops.

/Vhen the trigger is released, the spring 99 swings out the pivot 102 for the lever 10-), this spring being stronger than the spring 110, and as this lifts the shoulder 106 above the plate 97, the spring 110 swings the lower end of this lever 103 outward and carries the shoulder 106 to the position shown in Fig. 3. The trigger may now be pressed inward to again open the valve 13.

The details and proportions of the various parts of this tool may all be changed by those ski led in the art without departing from the spirit of my invention as set forth in the following claims.

I claim 1. In a staple forming and driving tool, a case, a staple forming mechanism and a staple driving device, said staple forming mechanism comprising a normally stationary member adapted to extend into the path of the staple driving device and a movable member adapted to bend wire around the normally stationary member to form a staple and then lift the stationary member out of the path of the driving device, and means to actuate said members consecutively, comprising a pneumatic motor and manually operated means to control the operation of the motor.

2. In a staple forming and driving tool. a case, a staple forming mechanism and a slidable staple driving device, the staple forming mechanism comprising a pivoted member adapted to swing into the path of the staple driving device and around which the staple is bent and a slidable member adapted to shear the staple wire and bend it around the pivoted member and then lift the pivoted member out of the path of the driving device, and means to force said slidable member and the driving device outwardly consecutively comprising a driving shaft, connections between the driving shaft and said slidable member and the driving (levi .c, a pneumatic motor to actuate the driving shaft, and manually operated means to control the motor.

3. In a staple forming and driving tool, a case, a staple forming mechanism and slidable staple driving device, the staple forming mechanism comprising a pivoted member adapted to swing into the path of the staple driving device and around which the staple bent and a slidable member adapted to shear the staple vvire and bend it around the pivoted member and then lift the pivoted member out of the path of the driving device, and means to force said slidable member and the driving device outwardly consecutively comprising a shaft and a pair of eccentrics thereon and connecting rods extending from the eccentrics to said slidable parts.

t. In a staple forming and driving tool, a case and a guide therein, a shearing and forming member slidable in the guide, means for feeding Wire thereto, said shearing and forming member having longituoinal guides, a staple driving ram slidable in said guides on the shearing and forming member, a cylinder, a piston slidable therein, a piston rod connecting the piston to said driving ram, a shaft, a crank thereon, a connecting rod pivoted to the piston rod and to said crank to turn the shaft, and means connecting the shearing and forming member to said shaft.

5. In a staple forming and driving tool, a case and a guide therein, a shearing and forming member slidable in the guide, means for feeding wire thereto, said shearing and forming member having longitudinal guides, a staple driving ram slidable in said guides on the shearing and forming member, a cylinder, a piston slidable therein, a piston rod connecting the piston to said driving ram, a shaft, a crank thereon, a connecting rod pivoted to the piston rod and to said crank to turn the shaft, means connecting the shearing and forming member to said shaft, and means operated by said shaft to actuate the means for feeding the Wire.

6. In a staple forming and driving tool, a case and a guide therein, a shearing and forming member slidable in the guide, means for feeding Wire thereto, said shearing and forming member having longitudinal guides, a staple driving ram slidable in said guides on the shearing and forming member, a cylinder, a piston slidable therein, a piston rod connecting the piston to said driving ram, a shaft, a crank thereon, a con necting rod pivoted to the piston rod and to said crank to turn the shaft, means connecting the shearing and forming member to said shaft, a valve operatively connected to said shaft for controlling the operation of said piston, and a manually operable valve to admit air under pressure to said first named valve.

7. In a staple forming and driving tool, a case and a guide therein, a shearing and forming member slidable in the guide, means for feeding Wire thereto, said sheering and forming member having longitudinal guides,

a staple driving ram slidable in said guides on the shearing and forming member, a cylinder, a piston slidable therein, a piston rod connecting the piston to said driving ram, a shaft, a crank thereon, a connecting rod pivoted to the piston rod and to said crank to turn the shaft, means connecting the shearing and forming member to said shaft, and a manually operable valve to admit air under pressure to said cylinder.

8. In a staple forming and driving tool, a case and a guide therein, a shearing and forming member slidable in the guide, means for feeding Wire thereto, said shearing and forming member having longitudinal guides, a staple driving ram slidable in said guides on the shearing and forming member, a cylinder, a piston slidable therein, a piston rod connecting the piston to said driving ram, a shaft, a crank thereon, a connecting rod pivoted to the piston rod and to said crank to turn the shaft, means connecting the shearing and forming member to said shaft, a valve to admit fluids under pressure to said cylinder, a trigger to open the valve, and means connected to said shaft to release the valve from said trigger.

9. In a staple forming and driving tool, a case, a staple forming device and a staple driving device therein, a pneumatic motor, means operatively connecting the motor to the forming and driving devices, a valve to control the admission of air to said motor, a manually operable trigger to open said valve, a spring to close the valve, and means operated by said motor to disconnect the trigger from the valve after the driving of a staple to permit the spring to close the valve.

10. In a staple forming and driving tool, a case and a guide therein, a shearing and forming member slidable in the guide, means for feeding Wire thereto, said shearing and forming member having longitudinal guides, a staple driving ram slidable in said guides on the shearing and forming member, a cylinder. a piston slidable therein, a piston rod connecting the piston to said driving ram, a shaft, a crank thereon, a connecting rod pivoted to the piston rod and to said crank to turn the shaft, and means connecting the shearing and forming member to said shaft, said crank being in the form of a disk having cam faces formed on its periphery, and a spring pressed roller engaging said periphery to prevent the crank from stopping on center.

11. In a staple forming and driving tool, the combination of a case, a main shaft therein, a Wire-holding spool rotatable on the case, a feed shaft on the side of the case at an angle to the main shaft, gearing whereby the feed shaft is driven intermittently by the main shaft, an idler shaft mounted parallel to the feed shaft, feed rolls for the Wire mounted on the feed and idler shafts, staple shearing and forming means in the case, means operatively connecting the same to the main shaft, a staple driving rain mounted in said case, a pneumatic motor, and means to operatively connect the motor to the main shaft and to the driving rain.

12. In a tool for forming and driving fasteners, the combination of a guide, a shearing and forming member slidabw thereon, a forming anvil pivotally rnoiii':.ted on the guide to cooperate With the slidable inent her to form staples, means to supply Wire to said tool to form the fasteners, a driving rain for the fasteners, a pneumatic cylinder and a piston therein, a piston rod connecting to said driving ram, and means operatively connecting to said piston rod to said slidable member.

13. In a staple forming and driving tool, the combination of a case and a guide therein, a shear member slidable in the guide, a driving ram slidable on the shear member,

i ,aeogvee e. shai't't to actuate the shear member, a pnec-- nistic cylinder and piston to actuate the ram and shaft, and an anvii pivoted on said guide on Which the ples bent, said anvil having a boss noinnillv extending into the path the driving ram, and cam ingeon the shear member ada; ted to move the boss on the anvil out of the path of the driving ram.

l i, in a staple forming and driving tool, the combination of case a main shaft therein provided with a crank and tvvo eccentrics,

guide in the case, a shear member slidable on the guide, a connecting rod between the shear member and one eccentric, a cylinder attached to the case, a piston and piston rod slidable in the cylinder, a connecting rod between the piston rod and crank, a driving ram tor the staples and means connecting the rain to the piston rod, a valve to control the piston, and a connecting rod between the second eccentric and said valve.

PAUL RISSMAN. 

